Composition for inorganic molded article production use, and method for producing inorganic molded article

Abstract

A resin composition for inorganic molded article production use, which is provided with inorganic particles each containing amorphous SiO2 and a photocurable resin composition, in which the photocurable resin composition contains a photocurable resin precursor and a photopolymerization initiator, the content of the inorganic particles is 60% by mass or more with respect to the total amount of the photocurable resin composition and the inorganic particles and is 60% by mass or more with respect to the entire amount of the resin composition for inorganic molded article production use, and the viscosity of the composition for inorganic molded article production use is 10000 mPa·s or less.

What is claimed is: 
     
       1. A resin composition for inorganic molded article production use comprising:
 inorganic particles containing amorphous SiO 2 ; and 
 a photocurable resin composition, 
 wherein the photocurable resin composition includes a photocurable resin precursor, and a photopolymerization initiator, 
 a content of the inorganic particles is 60% by mass or more with respect to a total amount of the photocurable resin composition and the inorganic particles and is 60% by mass or more with respect to an entire amount of the resin composition for inorganic molded article production use, 
 a viscosity is 10000 mPa·s or less, 
 wherein the inorganic particle includes a particle main body having an amorphous inorganic material as a main component, 
 a surface treatment layer covering at least a part of a surface of the particle main body, 
 wherein the inorganic particle includes a particle main body including a first amorphous inorganic material and a second crystalline inorganic material, and 
 a surface treatment layer covering at least a part of a surface of the particle main body, 
 the first amorphous inorganic material consists of amorphous SiO 2 , 
 the second crystalline inorganic material consists of silicon compounds, and 
 the second inorganic material has a crystallite diameter of 50 nm or less. 
 
     
     
       2. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the surface treatment layer is formed using a silane coupling agent as a forming material. 
 
     
     
       3. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the inorganic particle contains amorphous SiO 2  as a main component, and 
 an absolute value of a difference between a solubility parameter of the photocurable resin composition and a solubility parameter of the inorganic particle is 4 or less. 
 
     
     
       4. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the inorganic particle includes a first inorganic material which is amorphous SiO 2 , and a second crystalline inorganic material, 
 the first amorphous inorganic material consists of amorphous SiO 2 , 
 the second crystalline inorganic material consists of silicon compounds, 
 the second inorganic material has a crystallite diameter of 50 nm or less, and 
 an absolute value of a difference between a solubility parameter of the photocurable resin composition and a solubility parameter of the inorganic particles is 4 or less. 
 
     
     
       5. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the inorganic particle is spherical. 
 
     
     
       6. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the inorganic particles contain either or both TiO 2  and Al 2 O 3  as a forming material. 
 
     
     
       7. The composition for inorganic molded article production use according to  claim 1 ,
 wherein the photocurable resin precursor is an acrylic monomer. 
 
     
     
       8. The composition for inorganic molded article production use according to  claim 1 , further comprising:
 a dispersion medium. 
 
     
     
       9. The composition for inorganic molded article production use according to  claim 8 ,
 wherein the dispersion medium is an organic solvent. 
 
     
     
       10. A method for producing an inorganic molded article comprising:
 a step of forming a first molded article including inorganic particles and a photocurable resin by irradiating the composition for inorganic molded article production use according to  claim 1  with light; 
 a step of forming a second molded article using the inorganic particles as a forming material by firing the first molded article and removing the photocurable resin; and 
 a step of sintering the second molded article. 
 
     
     
       11. The method for producing an inorganic molded article according to  claim 10 ,
 wherein a viscosity of the composition for inorganic molded article production use is 5000 mPa·s or more and 10000 mPa·s or less, 
 the step of forming the first molded article includes a step of forming a pattern of the composition for inorganic molded article production use by selectively applying the composition for inorganic molded article production use, and 
 a step of forming a cured article having a shape of the pattern by irradiating the pattern of the composition for inorganic molded article production use with the light, and 
 the first molded article is formed as a laminate of the cured article by alternately performing the step of forming the pattern and the step of forming the cured article. 
 
     
     
       12. The method for producing an inorganic molded article according to  claim 10 ,
 wherein a viscosity of the composition for inorganic molded article production use is less than 5000 mPa·s, 
 the step of forming the first molded article includes a step of forming a pattern of a cured article of the composition for inorganic molded article production use by selectively irradiating the composition for inorganic molded article production use with the light, and 
 a step of supplying the composition for inorganic molded article production use to a surface of the pattern of the cured article, and 
 the first molded article is Ruined as a laminate of the cured article by alternately performing the step of forming the pattern and the step of supplying the composition for inorganic molded article production use.